The big issue is still the fact that the EVF is at the end of the camera and not on the side so you have to mount the 600 on the rig and it's entire length is extending out from your eye so that not a stable position at all. and you have to support the entire camera weight with your eye as the pivot point which makes it over front heavy. I certainly wouldn't like to have to support that all night!

I operate a 790 and 650 daily. I hate the 650, and hate the 790, but would love the 890. I want the chips and XAVC from the 650 with the glass and controls of the 790. I really really hate using the 650.